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7 Tips and Tricks
7.14 Entering the Fuel/Air Ratio Control With The Burner Stationary
Disconnect ’Burner On’ signal (terminal 2) so that burner does not start
Control the fan manually (e.g. Bridge terminal 81 and terminal 89 on relay R16)
CAUTION!
Danger of electrical shock!
As a result, terminal 92 also receives a voltage
Enter curve.
Remove manual activation of the fan (e.g. remove bridge terminal 81 and terminal 89 on relay
R16).
Re-connect ’Burner On’ signal (terminal 2) again.
7.15 Recirculation Damper Closed During Pre-purge
The pre-purge behaviour of the re-circulation duct according to the technical regulations on
steal boilers [TRD] is incorporated into the software of the VMS. That is, the re-circulation
dampers always open with a delay. If the system subsequently requires the re-circulation to
remain closed during pre-purge, this can be achieved by means of the pre-purge limit param-
eters (parameter 346-350).
Clear range limits:
Switch (2) to CLEAR MEMORY
Press ENTER.
Switch (2) to AUTOMATIC
Select pre-purge limit parameter for the re-circulation duct
Enter CLOSE position of the re-circulation damper
Have range limits re-entered through pre-purge
Now the re-circulation damper does not open during pre-purge.
7.16 Switching the Burner On Again Through the Setpoint
If the integral output controller is used and a negative value is entered in parameter 802, it is
possible to achieve a situation where the burner is switched on accordingly through the set-
point.
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